The Internet - A Comprehensive Guide PDF

Internet What is the internet?→The internet is a worldwide collection of computer networks (global area network) that can be connected for the purposes of sharing resources or communicating Explain the function of the three different parts of the internet Host→A sender or receiver computer; e.g....

Internet What is the internet?→The internet is a worldwide collection of computer networks (global area network) that can be connected for the purposes of sharing resources or communicating Explain the function of the three different parts of the internet Host→A sender or receiver computer; e.g. your workstation or server Link→Transmission media that connects various hosts together Router→Devices used to determine the path(s) along which data must travel to get between different hosts; usually used to connect an organisation's network to an ISP's network to enable Internet access Basic services on the internet Benefits of cloud storage No need to buy or maintain new equipment Accessible at any time from any location given an internet connection Pay for only the storage that you use Capable of remote backups Concerns with cloud storage Unreliable internet stops data access Data security concerns, rely on others to protect your data The company holding your data could lose it Email Name three different email protocols and their use SMTP→Simple mail transfer protocol; Send messages POP or IMAP→Post office protocol; Internet message access protocol; Retrieve message from mail server Protocols↔Set of rules governing data communication over a network. IP Addresses Common internet protocols TCP→Transmission Control Protocol, protocol responsible for ensuring that a data transmission reaches its destination host IP→Internet protocol, identifies computers connected to the Internet Together, they make the TCP/IP suite Each host has a unique hostname/domain name and IP address Explain the different between a domain name and an IP address→A domain name is made up of characters easy for humans to understand while an IP address is a 32 (IPv4) or 128 (IPv6) bit number that uniquely identifies a host Connecting to the Internet Explain 4 types of connections to the internet Asymmetric Digital Subscriber Line (ADSL)→Fast copper transmission Fibre→Fastest connection; uses light Wireless→Radio frequency Cellular→Accessible with a SIM card The World Wide Web The WWW↔A mass of linked web pages accessible via the internet and are connected using hyperlinks Explain the difference between a web page and a website→A web page is any document on the internet, while a website is a collection of different web pages that are often linked using hyperlinks Uniform resource locator (URL)↔Unique identifier for a web page on the internet; may use a protocol such as Http (hypertext transfer protocol) Searching the Web Web browser→A program used to locate and view web pages by processing HTML code Search engine→A program that searches documents on the web for specified keywords and returns a list of hyperlinks to the pages/documents that contained these keywords Give three tips for effective searching State exactly what you want to find Identify keywords Use synonyms Give the three logical search operators and their symbols in order of operation Not - And + Or | User Interface Design Why should you concentrate on good UID?→The easier a piece of software is to use, the more likely people are to use it Explain the five pillars of good UID Readability→Reducing the number of elements on the screen and placing the elements in logical positions, as well as using recognisable icons Navigation→Make it possible for any user entering the page to find what they are looking for in a maximum of three clicks. Navigate between pages using menu bars and buttons (hyperlinks) that are located in the same place on every page. Find where you are in the site through well-structured headings and formats. Typography/Colour→Large enough fonts available in all web browsers, use colours in a predictable manner (take into account their connotations) and limit the total amount of colours used. Layout→Simple, logical, easy to use Consistency→Create a constant and predictable theme with colours, fonts, layouts, and designs throughout the page so that users can easily understand the function of different elements on the page. Repeated elements should look the same on different pages and devices.